Augustine of Hippo
Catena Aurea · Johannesevangelium 21
Joh 21, Verses 18–19English original
Verily, verily, I say unto thee, When thou wast young, thou girdedst thyself, and walkedst whither thou wouldest: but when thou shalt be old, thou shalt stretch forth thy hands, and another shall gird thee, and carry thee whither thou wouldest not. This spake he, signifying by what death he should glorify God.
(Tract. cxxiii) He who denied and loved, died in perfect love for Him, for Whom he had promised to die with wrong haste. It was necessary that Christ should first die for Peter’s salvation, and then Peter die for Christ’s Gospel.